Control system for a hydraulic press

Details Control system for a hydraulic press Control system for a hydraulic press

1979-02-12

1980-06-24

Yost, Frank T.

Cutting

Means to drive or to guide tool

With simple rectilinear reciprocating motion only

72443, 83639, 100269R, B26D 512

Patent

active

042089352

ABSTRACT:
A control system for a hydraulic punch press is adapted to dissipate the energy stored in a hydraulic actuator so that the punch will exit the workpiece without substantial release impact. The control system includes a signal generator for producing a progressively increasing command signal while the punch penetrates the workpiece, a position transducer for producing a negative feedback signal indicating the actual punch position during such penetration, and a summing point for supplying the difference between the command and actual signals as an error signal to a servovalve used to control operation of the actuator.

REFERENCES:
patent: 3827328 (1974-08-01), LaFlamme et al.
patent: 4022096 (1977-05-01), Forichon
patent: 4116122 (1978-09-01), Linder et al.

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